题解 | #小乐乐算多少人被请家长#

#include <stdio.h>
int main()
{
	int n = 0;
	int i = 0;
	int a, b, c;
	double sum = 0;
	int count = 0;
	scanf("%d", &n);
	for (i = 0; i < n; i++)
	{
		scanf("%d %d %d", &a, &b, &c);
		sum = (a + b + c) / 3.0;
		if (sum < 60.0)
		{
			count++;
		}
	}
	printf("%d", count);
	return 0;
}